Troubleshooting a malfunctioning PCB

[Mindspider]

Hello all,

The top row of my keyboard recently started malfunctioning, and I could use some help troubleshooting. Each key is activating the column of keys below: ESC also activates Tab/Caps/Shift/Ctrl, 1 also activates QAZ, 2 activates WSX, etc. My PCB is a DZ60RGB-ANSI v1 hotswap from KBDfans. No known cause of damage: no drops, no spills, haven't moved the keyboard recently.

I took apart the board and did not find any obvious damage or bad solder joints. I tried flashing the board several times, which did not fix the issue. Any suggestions?

[shallot]

Sounds like you have a short somewhere near the controller if it's happening on all columns.

[Mindspider]

Thanks for the reply. Is there a way to identify and repair a short like that, or should I expect to need to replace the PCB?